The front of an A-frame cottage has the shape of an isosceles triangle. It stands 30 feet high and is 20 feet wide at its base. What is the angle of elevation of its roof? (Round your answer to two decimal places.)

Answer 1

I see 8 consecutive posts by you without any work or effort shown on your part.
The purpose here is NOT to simply do a student's homework or assignment.
I have done 2 of them , now you do some and they will be checked

Answer 2

Tan A = h/(b/2) = 30/10.